Lennox ComfortSense 7500 Series User manual

507505-02
6/2018
Supersedes 5/2017
ComfortSense®7500 Commercial
Thermostat
User Guide

2
Table of Contents
Features................................................................2
Home Screen Temperature Indicator.................2
Home Screen Information...................................3
Operating Mode Selection ..................................5
Select Modes ................................................................. 5
Fan Operation ................................................................ 6
User Menu Screen ...............................................7
Notications.................................................................... 7
Reminders...................................................................... 7
Performance Report....................................................... 8
Edit Schedules ............................................................... 8
User Settings Menu...........................................10
Features
The ComfortSense®7500 Series thermostat is an
electronic 7-day, universal, multi-stage, programma-
ble, touchscreen thermostat.
• supports commercial package rooftop units
• smooth set recovery starts system operation
• early to achieve setpoint at start of program period
• economizer control
• dehumidication measurement and control
• equipment maintenance reminders
• worry-free memory storage feature
• menu-driven touch-screen display
• dehumidication measurement and control
• Humiditrol®EDA capability
Home Screen Temperature Indicator
2:31 am | thurs
heat−to
cool−to
80
inside 57%
heat/cool
away
72°
78°
outside
89°
waiting
0
ⒸⒷ
Ⓐ
Ⓔ
ⒹⒻ
occupied
Figure 1. Temperature Dial Feature
A. This is the heat set point position indicator on
the dial. This object will be red in color.
B. This is the cool set point position indicator on the
Dial. This object will be blue in color.
C. This is the location area where no system
demand is active. In gure 1, the example would
be any temperature between 73°F and 77°F.
D. When there is an active call for heating, this area
of the dial will fade back and forth from white to
red.
E. When there is an active call for cooling, this area
of the dial will fade back and forth from white
to blue.

3
F. The yellow line indicates the actual room
temperature on the temperature dial indicator.
Home Screen Information
2:31 am thurs
occupied
heat−to
cool−to
inside 57%
heat/cool
away
72°
78°
outside
89°
Schedule hold
until next period
X
0
Ⓛ
holiday
Ⓒ
Ⓜ
Ⓑ
Ⓚ
Ⓐ
Ⓘ
ⒺⒻ
Ⓖ
Ⓙ
Ⓓ
Ⓔ
Ⓕ
Ⓗ
80
waiting
Figure 2. Home Screen
Touch the screen to turn on the back-light if it is off.
A. OPERATING MODE - touch to access the
screen that will list available modes. Selectable
modes are heat/cool, heat only, cool only, off,
emergency heat, schedule 1, schedule 2, and
holiday. In addition fan operation can be set to
on, auto or circulate.
B. AWAY - Selecting AWAY will allow the user to set
the heating and/or cooling mode temperatures
when away from home. Touch cancel to exit
this screen and return to the home screen and
normal system operations.
C. Displays current time.
D. Menu - This will allow access to notications,
performance report, schedules and settings.
E. This allows you to set the heat-to (if enabled)
temperature. Selecting the heat-to or
temperature dial position indicator will take you
to the temperature setting detail screen. The
temperature dial will change from white to red
when heating is active.
F. This allows you to set the cool-to (if enabled)
temperature. Selecting the cool-to or
temperature dial position indicator will take you
to the temperature setting detail screen. The
dial will change from white to blue when cooling
is active.
G. Indicates the current indoor humidity percentage
in the home along with a humidity icon (rain
drop). The icon changes based on the humidity
level in the home.
H. This location could display the outdoor
air temperature. What is displayed in that
location depends on what sensor is installed
and congured through the thermostat user
interface. If neither is installed, then this area
will be blank.
I. Displays the current indoor temperature.
J. Indicates the schedule is on hold until the next
time period or permanent.
• Place the schedule on hold by touching on
either the heat-to or cool-to location on the
screen. If an adjustment is required for the
temperature setting, this can be done now.
• After approximately three seconds the
screen will display the override setting
options.

4
• From the override setting screen, the
options are 1 hour, 2 hour or next scheduled
period. Make selection and then touch set.
• For the 1 or 2 hour setting the home
screen will indicate schedule hold until time
indicated (i.e., 11:57 pm). To exit schedule
hold, touch X
• When until next period is selected, the set
point will be kept until the next program
schedule period. To exit until next period,
touch X.
K. System Status Icons - Equipment operation
information appears along the left side of the
home screen. The displayed icons will indicate
cooling or heating demand, cooling compressor
delay, or cooling demand.
Table 1. System Status Icons
Icon
Description
NOTE: Touching the icon will display a
text description.
Humidifying icon is displayed when
humidifying is occurring. Touching on
the icon will display humidifying next to
the icon.
Dehumidifying icon is displayed when
dehumidifying is occurring. Touching
the icon will display dehumidifying next
to the icon.
Red ames indicates the system is
heating.
Table 1. System Status Icons
Icon
Description
NOTE: Touching the icon will display a
text description.
Blue ames indicates the system is
cooling.
Snow ake indicates the next mode
of operation will be cooling. Waiting
indicates there is a compressor delay
which is by default ve minutes.
Red ame indicates the next mode
of operation will be heating. Waiting
indicates there is a compressor delay
(heat pump heating) which has a default
of ve minutes and is not adjustable.
Indicates the system is running in
emergency heat mode.
All heat pumps operating in northern
climates below 35°F (1.6°C) normally
need a supplemental heating source.
Usually it is in the form of electric
heating provided by the indoor unit.
Other sources could be gas, oil, or
hot-water back-up systems as well. The
supplemental heat is also referred to
as “second-stage” or “back-up” heating,
with “rst-stage” being the heat pump
only. Emergency heat is when you use
your supplemental heat (2nd stage) by
itself, without the use of your heat pump
(1st stage heat). Not available for non-
heat pump systems.

5
Table 1. System Status Icons
Icon
Description
NOTE: Touching the icon will display a
text description.
Indicates the system is running in
auxiliary heat mode.
Is only available with heat pump
system. If outdoor temperature is above
the high balance point, only the heat
pump will operate - default 50°F (10°C)
high. If outdoor temperature is below
the low balance point, only auxiliary
heating will operate - default 25°F
(-4.0°C) low. If outdoor temperature is
in-between the high and low balance
point, both the heat pump and auxiliary
heat sources can operate.
Transitioning to next schedule
temperature setting. This icon will only
appear if smooth setback recovery is
enabled under the installer setup. When
enabled, it will begin recovery up to
two hours before the programmed time
so that the programmed temperature
is reached at the corresponding
programmed event time. Assume 12°F
per hour for gas/electric heating and
6°F per hour for rst stage compressor
based cooling. When smooth set back
recovery is disabled, the control will
start recovery at the programmed time
set in the schedule.
L. Holiday Mode - Selecting this option allows for
overriding schedules for holidays and special
days. When in this mode the thermostat will not
follow regular schedules. This override can be
setup for up to four days. Go to menu > user
settings > edit schedules and select Holiday. To
exit Holiday mode, touch the cancel button on
the home screen.
M. Indicates whether in occupied or unoccupied
mode when running a regular schedule. This will
be displayed when running schedule 1 or 2 and
holiday. Under edit schedules, either occupied
or unoccupied can be set under the day time
event (occ1, unocc1, occ2 and unocc2).
Operating Mode Selection
Touch anywhere in the area indicated below to se-
lect how the system will operate.
holiday
heat−to
78
inside 57%
schedule 1
away
68°
outside
32°
waiting
0
2:31 am thur
occupied
Figure 3. Operating Mode Selection
Select ModeS
1. HEAT/COOL allows the thermostat to switch
between heating and cooling automatically.

6
2. HEAT ONLY allows only heating demand.
3. COOL ONLY allows only cooling demand.
4. OFF indicates system has been turned off.
5. EMERGENCY HEAT allows heat pump system
to use a secondary heat source to come on
and reach the desired user temperature setting
faster.
6. SCHEDULES (1, 2 or holiday) See Edit
Schedules on page 13 for customizing
schedules).
7. ON, AUTO and CIRCULATE - Select by
touching the desired fan operation ON, AUTO
and CIRCULATE. When selected a green check
mark will be indicated.
If FAN mode AUTO, ON or CIRCULATE is selected
during scheduling for the current period, the ther-
mostat will indicate the current fan mode in the in-
formation display (FAN ON or FAN CIRC). In the
CIRCULATE mode, the fan will follow the setting
congured under menu > settings > fan >select
fan mode. Under circulate the circulate off time can
be set from 1 to 30 minutes.
Fan operation
The desired fan mode can be selected in addition to
selected mode of operation.
Table 2. Fan Operation
Icon Mode Description
on
Fan is NOT following the
schedule and runs continuously
until it is changed from the
select mode.
auto Fan will follow the fan setting in
the selected schedule.
circulate
Fan is following schedule
and cycles during periods of
equipment inactivity. Circulate
off time is set by the user.

7
User Menu Screen
Touch the three lines in the upper right-hand cor-
ner of the screen to access the menu. Selectable
options under menu are notications, performance
report, edit schedules and settings.
menu
performance report
notifications 13
edit schedules
settings
Figure 4. User Menu Screen
notiFicationS
When a system error or reminder occurs, a pop-up
screen will appear indicating the condition.
• Error code notication pop-up can be dismiss by
touching the back button. Contact the dealer to
resolve the issue.
• For notication, touch either clear or set a future
reminder.
• Any active history for notications (critical errors
or reminders will be listed under settings >
notication.
• If critical errors occur, they will also be displayed
under notications as illustrated in gure 6.
• Touch the contractor info option for assistance.
notifications
high temperature protection
error code: 0004
<
05/22 12:23pm
dealer info
critical reminders
Figure 5. Critical Notications
reMinderS
When reminders occur, they will also be displayed
under notications as illustrated in gure 7. Touch
the clear or remind later to redisplay active reminder
for 1 day, 1 week, 1 month, 3 months or a custom
date.
notifications
critical
media filter
<
reminders
05/22 12:23pm
Clear remind later
Figure 6. Reminder Notications

8
perForMance report
This will display the total number of hours each
month that the system has been running. Example
would be for mar (March) 23H or 23 hours. To re-
turn to the menu screen, touch the house icon in the
upper left-hand corner of the screen. Red bar indi-
cates heating and blue indicates cooling hours ran.
edit ScheduleS
Any schedule can be edited by touching the right
arrow next to the desired schedule.
edit schedules
>
schedule 1
schedule 2
holiday
>
>
<
add schedule
Figure 7. Edit Schedules Screen
NOTES: See “Operating Mode Selection” on page
5 to run a specic schedule.
From the HOME screen touch the MENU and touch
edit schedules option.
The edit schedules screen will allow section of up
too three separate schedules. On the edit schedules
screen, each schedule can be renamed and edited.
See “Figure 8. Renaming and Editing Schedules”
on page 9 for editing schedules.
NOTES: The fan mode that is selected under
the edit schedules screen will always
override the fan mode selected under the
select mode screen or user settings > fan
screen if different
For example, if the select mode fan setting or user
settings > fan is congured for Auto, and the
schedule fan mode is set to circulate, then the sys-
tem will follow the fan mode selected in the active
schedule.

9
edit schedules
·
schedule 1
·schedule 2
·schedule 3
schedule x
(rename)
·select days
·select mode
select days
·individual days
·week/weekend
·all 7 days
select mode
·heat/cool
·heat only
·cool only
Individual
days
·Monday
·Tuesday
·Wednesday
·Thursday
·Friday
·Saturday
·Sunday
·OCC1
·UNOCC1
·UNOCC2
·UNOCC3
Week /
weekend
·week
·weekend
all 7 days All days
wake
(rename)
·
time
·cool-to
·heat-to
·fan
·occupancy
time select time or
delete period
If period deleted
* A maximum of four time periods can be used. If any time periods are
deleted, an option to add a time period back will appear on this screen.
*
select fan mode
·
on
·auto
·circulate
·cool-to
and/or
·heat-to
select occupancy
·
occupied
·unoccupied
To navigate to the next
screen in the selection
process, always touch the
right-arrow next to the
desired option.
Figure 8. Renaming and Editing Schedules

10
User Settings Menu
Table 3. User Settings (General)
Setting Selection Function Description
fan See “Fan Operation” on page 6.
heat / cool (either heat
pump, gas or electric
heating is selected)
normal Heats home to desired temperature setting. Options are on or off.
comfort If system is two-stage heating or cooling, then 2nd stage is locked in
until demand is satised.
emergency
heat
Bypasses the rst stage of heating (any stage[s] of heat pump heating)
and goes directly to the heat stage used for maximum heating to more
quickly warm a very cold house.
set point
range
Heating limit with a default of 0°F. Range is 45°F to 90°F
Cooling limit with a default of 45°F. Range is 45°F to 99°F
cool only (option only
appears if no heating
equipment is avail able or
congured)
set point
range Cooling limit with a default of 45°F. Range is 45°F to 99°F
humidity - Allows selection
of dehumidication. Option
only available if enabled in
installer settings.
dehumidify Options are ON and OFF. Allows dehumidify adjustment setting
between 45% to 60%. Default is 50%.